CVE-2018-16841

Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba's KDC will call tallocfree() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with tallocfree() and directly calls abort(), terminating the KDC process.

References

Affected packages

Git / github.com/samba-team/samba

Affected ranges

Type

GIT

Repo

https://github.com/samba-team/samba

Events

Introduced

b85f6018c803fb9aad82820d4b5505179ec5bac3

Fixed

b7d190f89d7674cf58a02486fa9887d393918611

Introduced

5a9d09fee44052e18ce241ec28f78498d2e20d73

Fixed

cd870beb978a334b948c6992059540c864dd2540

Introduced

4fc4ae2924aaa2fc184b7385069274526fa8a4c2

Fixed

40c057c900a9367e8020c943d29547ea8942212f

Database specific

{
    "versions": [
        {
            "introduced": "4.3.0"
        },
        {
            "fixed": "4.7.12"
        },
        {
            "introduced": "4.8.0"
        },
        {
            "fixed": "4.8.7"
        },
        {
            "introduced": "4.9.0"
        },
        {
            "fixed": "4.9.3"
        }
    ]
}

Affected versions

ldb-1.*

ldb-1.3.3

ldb-1.3.4

ldb-1.3.5

ldb-1.3.6

ldb-1.4.3

samba-4.*

samba-4.8.0

samba-4.8.1

samba-4.8.2

samba-4.8.3

samba-4.8.4

samba-4.8.5

samba-4.8.6

samba-4.9.0

samba-4.9.1

samba-4.9.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16841.json"

unresolved_ranges

[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "12.04"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "14.04"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "16.04"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "18.04"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "18.10"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "9.0"
            }
        ]
    }
]